In normal ranked the true meta doesn't really matter, and hell sometimes the meta can have a few interesting twists to it where some champions work in competitive scene that aren't considered meta picks.
This current meta is a bit snowbally, and operates by applying pressure to specific lanes to try and gain a lead through first turret blood which is strong as heck. Gangplank is a farm oriented champion but his ult lets him apply pressure across the map without having to teleport across the map which fits pretty well actually.
With the current meta the only issue is reaching that late game but as I said it doesn't really matter too much until you reach competitive play.